body{
	overflow: hidden;
}
.chat{

}
.chat-btn{
	position: fixed;
	color: #0CF;
	top: 10%;
	right: 5%;
}
#blackboard{
	width: 100%;
	height: 100%;
	// background: url("/images/blackboard.jpg") no-repeat;
	// background-size:100% 100%;
	.panel-body{
		padding: 0;
	}
	canvas{
		cursor: default;
		width: 100%;
   		height: 100%;
   		background-color: #F0F0F0;
	}
}
#screen{
	width: 100%;
	height: 100%;
	display: none;
}
#videos{
	position: absolute;
	right: 16px;
	width: 255px;
}
#videos video{
	width: 255px;
}